OpenHarmony支持USB接口声卡适配说明

作者：软通动力HOS 2023-03-21 18:10:34系统 OpenHarmony 本文介绍了OpenHarmony系统适配USB声卡的接口指导说明希望对大家有所帮助。

​​想了解更多关于开源的声卡适配说明内容，请访问：​​

​​51CTO 开源基础软件社区​​

​​https://ost.51cto.com​​

前言

USB声卡是接口一种外置声卡，不受主机硬件约束可以实现更好的声卡适配说明声音品质和更多的功能。使用USB接口支持热插拔，接口方便易用，声卡适配说明在生活中被广泛使用。接口

1、声卡适配说明功能描述

OpenHarmony ADM（Audio Driver Model）框架支持USB声卡的接口插拔识别，支持USB声卡的声卡适配说明播放、录音、接口音量控制和静音功能。声卡适配说明

2、接口构建开关

CONFIG_DRIVERS_HDF_AUDIO_USB
OpenHarmony系统ADM（Audio Driver Model）框架要支持USB声卡首先要打开构建开关：CONFIG_DRIVERS_HDF_AUDIO_USB=y

3、声卡适配说明功能配置

（1）配置文件：device_info.hcs 添加USB声卡节点

文件路径：
vendor/isoftstone/yangfan-j/hdf_config/khdf/device_info/。接口​

hostName = "audio_host";
priority = 110;...
device_audio :: device { ...
device_usb :: deviceNode { 
policy = 2;
priority = 60;
preload = 2;
permission = 0666;
moduleName = "HDF_AUDIO";
}
}...
}

（2）配置文件：audio_config.hcs 添加USB声卡服务信息

...
controller_0x120c1002 :: card_controller { 
match_attr = "hdf_audio_driver";
serviceName = "hdf_audio_codec_usb_dev";
}
}
}

4、应用样例

audio_sample_render是用来测试录音功能的工具，audio_sample_capture是用来测试播放功能的工具，audio_sample_event是用来检测USB插拔事件上报的工具。这两个工具可以通过编译得到，编译命令如下：
./build.sh --product-name *** -T audio_sample_render -T audio_sample_capture -T audio_sample_event。

cd /data/
./audio_sample_render YoungForYou.wav
./audio_sample_capture 123.wav

5、功能验证

使用hdc工具推送audio_sample_render和audio_sample_event和wav音频文件到开发板data目录下。

hdc file send E:\audio_sample_render /data
hdc file send E:\audio_sample_event /data
hdc file send E:\xxx.wav /data

（1）USB声卡类设备插拔检测

进入shell端口进行一次USB设备插入、拔出流程。

cd /data/
chmod +x audio_sample_event
./audio_sample_event

（2）USB声卡类设备放音

进入shell端口进行一次完整的播放、停止、退出流程。

cd /data/
chmod +x audio_sample_render
./audio_sample_render YoungForYou.wav
==================== Loading Mode ===================
| 1. Passthrough Loading                               |
| 2. IPC Loading                                       |
======================================================
Please enter your choice:
2
================= Select Audio Card ==================
1. primary
2. primary1
3. hdmi
4. usb
5. a2dp
======================================================
Please enter your choice:
4
================== Play Render Menu ==================
| 1. Render Start                                      |
| 2. Render Stop                                       |
| 3. Render Resume                                     |
| 4. Render Pause                                      |
| 5. Render SetVolume                                  |
| 6. Render GetGain                                    |
| 7. Render SetMute                                    |
| 8. Render SetAttributes                              |
| 9. Render SelectScene                                |
| 10. Render getEXtParams                              |
| 11. Render getMmapPosition                           |
| 12.Exit                                              |
======================================================
your choice is:
1
Music channels = 2
Music Rate     = 44100 Hz
Music Bit      = 16 bit
============= Play Render Mode ==========
| 1. Render non-mmap                     |
| 2. Render mmap                         |
========================================
Please enter your choice:
1
Start Successful,Music is playing
================== Play Render Menu ==================
| 1. Render Start                                      |
| 2. Render Stop                                       |
| 3. Render Resume                                     |
| 4. Render Pause                                      |
| 5. Render SetVolume                                  |
| 6. Render GetGain                                    |
| 7. Render SetMute                                    |
| 8. Render SetAttributes                              |
| 9. Render SelectScene                                |
| 10. Render getEXtParams                              |
| 11. Render getMmapPosition                           |
| 12.Exit                                              |
======================================================
your choice is:
2
Stop Successful
================== Play Render Menu ==================
| 1. Render Start                                      |
| 2. Render Stop                                       |
| 3. Render Resume                                     |
| 4. Render Pause                                      |
| 5. Render SetVolume                                  |
| 6. Render GetGain                                    |
| 7. Render SetMute                                    |
| 8. Render SetAttributes                              |
| 9. Render SelectScene                                |
| 10. Render getEXtParams                              |
| 11. Render getMmapPosition                           |
| 12.Exit                                              |
======================================================
your choice is:
12

（3）USB声卡类设备录音

进入shell端口进行一次完整的录音、停止、退出流程。

==================== Loading Mode ===================
| 1. Passthrough Loading                               |
| 2. IPC Loading                                       |
======================================================
Please enter your choice:
2
================= Select Audio Card ==================
1. primary
2. usb
======================================================
Please enter your choice:
2
============== Play Capture select ===========
| 1. Capture Poll                             |
| 2. Capture Interrupt                        |
==============================================
Please enter your choice:
1
================== Play Capture Menu ==================
| 1. Capture Start                                      |
| 2. Capture Stop                                       |
| 3. Capture Resume                                     |
| 4. Capture Pause                                      |
| 5. Capture SetVolume                                  |
| 6. Capture SetGain                                    |
| 7. Capture SetMute                                    |
| 8. Capture SetAttributes                              |
| 9. Capture SelectScene                                |
| 10. Capture GetExtParams                              |
| 11. Capture getMmapPosition                           |
| 12.Exit                                               |
=======================================================
your choice is:
1
============= Play Capture Mode ==========
| 1. Capture non-mmap                     |
| 2. Capture mmap                         |
=========================================
Please enter your choice:
1
Start Successful
================== Play Capture Menu ==================
| 1. Capture Start                                      |
| 2. Capture Stop                                       |
| 3. Capture Resume                                     |
| 4. Capture Pause                                      |
| 5. Capture SetVolume                                  |
| 6. Capture SetGain                                    |
| 7. Capture SetMute                                    |
| 8. Capture SetAttributes                              |
| 9. Capture SelectScene                                |
| 10. Capture GetExtParams                              |
| 11. Capture getMmapPosition                           |
| 12.Exit                                               |
=======================================================
your choice is:
Recording,the audio file size is 512Kb
Recording,the audio file size is 1024Kb
2
Stop Successful
================== Play Capture Menu ==================
| 1. Capture Start                                      |
| 2. Capture Stop                                       |
| 3. Capture Resume                                     |
| 4. Capture Pause                                      |
| 5. Capture SetVolume                                  |
| 6. Capture SetGain                                    |
| 7. Capture SetMute                                    |
| 8. Capture SetAttributes                              |
| 9. Capture SelectScene                                |
| 10. Capture GetExtParams                              |
| 11. Capture getMmapPosition                           |
| 12.Exit                                               |
=======================================================
your choice is:
12
Record file path:123.wav

总结：

支持USB声卡可以大幅丰富设备的使用场景，可以提高用户体验，本文介绍了OpenHarmony系统适配USB声卡的指导说明希望对大家有所帮助。

​​想了解更多关于开源的内容，请访问：​​

​​51CTO 开源基础软件社区​​

​​https://ost.51cto.com​​

责任编辑：jianghua 来源： 51CTO 开源基础软件社区 USB接口鸿蒙

(责任编辑：焦点)